Today's Message Index:
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1. 07:42 AM - Re: Australia Findings / Filled Rivets / Wheel Pants (chris Sinfield)
2. 03:44 PM - Re: Re: Australia Findings / Filled Rivets / Wheel Pants ()
3. 04:12 PM - Re: Re: Australia Findings / Filled Rivets / Wheel Pants (Bryan Martin)
Message 1
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| Subject: | Re: Australia Findings / Filled Rivets / Wheel Pants |
Here is a link to the Aussie RAA website..
The canopy latch pictures are in download 13 Jan 09 page
http://www.auf.asn.au/airworthiness/index.html#zenith
There are lots of ways to do this, it was a stop gap system we came up with down
here till we get some more info from Zenith..
Chris.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=257285#257285
Message 2
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| Subject: | Re: Australia Findings / Filled Rivets / Wheel Pants |
I went a somewhat different way. After trying several latch systens,
which I didn't like, I hit on an idea gleaned from the 650 canopy. I
used a linkage from a cross-tube, pushing two spring loaded barrel bolts
into each side. Description follows, since I'm not savvy enough to
attach pics: I ran a garage door lock handle through the side,
slightly below the level of the package shelf, with a square aluminum
tube all the way across into a fabricated socket inside the right side
skin. The rod moves two spring loaded short arms, which, in turn, pull
a barrel bolt on each side into a piece of 3/4 square tube welded to the
inner side of the existing canopy frame. The barrel bolts ride in a
sleeve of aluminum tubing, held in place by two U-shackles set through
a plate over the triangular piece at the outer edge of the seat back,
forward of the shoulder harness plate. I ran two coil springs from about
two thirds up the actuator arms, to the lower part of the baggage
shelf. They pull the barrel bolts forward into the tubing stubs. For an
interior release, I ran a 1/4" inch 4130 rod up under the cockpit sill,
back along the stringer, with a 90 bend to fit into a hole in the left
actuator arm, and a 90 bend at its forward end, just short of, and below
the instrument panel. In use, twisting the outside handle releases
ther bolts, and the springs pull them forward again. When you close the
canopy, you pull the steel rod back, canopy fits in place, and then you
push the rod forward to let the barrel bolts slide into place. Crude,
but effective.
Paul R
----- Original Message -----
From: chris Sinfield<mailto:chris_sinfield@yahoo.com.au>
To: zenith601-list@matronics.com<mailto:zenith601-list@matronics.com>
Sent: Wednesday, August 12, 2009 9:42 AM
Subject: Zenith601-List: Re: Australia Findings / Filled Rivets /
Wheel Pants
<chris_sinfield@yahoo.com.au<mailto:chris_sinfield@yahoo.com.au>>
Here is a link to the Aussie RAA website..
The canopy latch pictures are in download 13 Jan 09 page
http://www.auf.asn.au/airworthiness/index.html#zenith<http://www.auf.asn.
au/airworthiness/index.html#zenith>
There are lots of ways to do this, it was a stop gap system we came up
with down here till we get some more info from Zenith..
Chris.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=257285#257285<http://forums
.matronics.com/viewtopic.php?p=257285#257285>
http://www.matronics.com/Navigator?Zenith601-List<http://www.matronics.co
m/Navigator?Zenith601-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 3
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| Subject: | Re: Australia Findings / Filled Rivets / Wheel Pants |
I keep reading posts praising the virtues of the new latching system,
but there has already been at least one serious accident after a
canopy with the new system came open in flight. I will admit that the
new system has some advantages, for one, you can clearly see if the
latches are secure. Assuming of course someone bothers to look at them
during preflight. In the case I am aware of, the canopy came open in
in flight because one side was not fastened and the pilot in the right
seat tried to close it in flight. I know you're not supposed to
attempt to re-latch the canopy in flight, but not everyone pays close
enough attention to the POH.
The way the new system is designed, any attempt to close one side of
the canopy in flight is almost certainly going to cause the other side
to unlatch. At least with the old system, this is not likely to happen
because both sides latch up independently of each other. I think the
new system can be improved by putting slots where the linkages connect
to the latch hooks and a spring on each hook to allow each side to
latch independently of the other. That way trying to re-latch one side
of the canopy will not affect the other latch. This should not be a
difficult modification to make.
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
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